A) \[500\]
B) \[600\]
C) \[700\]
D) \[400\]
Correct Answer: B
Solution :
: \[\beta =\frac{\lambda D}{d}\] ?..(i) \[\beta =\frac{\lambda D}{d}\] ??..(ii) Subtract (ii) from (i), we get \[\beta -\beta =\frac{\lambda (D-D)}{d}\] Substituting the given values, we get \[3\times {{10}^{-5}}m=\frac{\lambda \times 5\times {{10}^{-2}}m}{1\times {{10}^{-3}}m}\] \[\lambda =\frac{3\times {{10}^{-8}}}{5\times {{10}^{-2}}}m=0.6\times {{10}^{-6}}m\] \[=600\times {{10}^{-9}}m=600nm\]You need to login to perform this action.
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